<?php

  include_once "errorCode.php";  

  /**
   * SHA1 class
   *
   * 
   */
  class SHA1
  {
    /**
     * 用SHA1算法生成安全签名
     * @param string $token 票据
     * @param string $timestamp 时间戳
     * @param string $nonce 随机字符串
     * @param string $encrypt 密文消息
     */
    public function getSHA1($token, $timestamp, $nonce, $encrypt_msg)
    {
    	//排序
    	try {
        $array = array($encrypt_msg, $token, $timestamp, $nonce);
        sort($array, SORT_STRING);
        $str = implode($array);
        return array(ErrorCode::$OK, sha1($str));
    	} catch (Exception $e) {
    		//print $e . "\n";
    	  return array(ErrorCode::$ComputeSignatureError, null);
    	}
    }  

  }


